Starting device for motors.



N. 882,946. I PATBNTED MAR. 24, 190s.

M. J. S. A. ISNARD".

'STARTING DEVICE FOR MOTURS.

'APPLIOTIQI FIVLED IAB. 20, 1806. 2 SHBET8 BHEET l.

Alfani/frs No. 882,946. PATENTBD MAR. 24, 1908.

Nt. Jys. A. IsNARn.

STARTING DBVIGBFOR MOTORS.

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4mm rs UNrrED STATES rArE'NT OFFICE.

MAXENCE JOSEPH sIDoINE ALEXIS Is'NAED, or GRENOBLE, FRANCE, AssIeNoR rro PAUL `nEEvEr AND LoUIs AUGUSTIN NOVEJOSsERANn, or LYON, FRANCE, AND NOEL l DUMOND, or TAssIN LA DEMI-LUNE, NEAR LYON, FRANCE.

s'ranrnm :DEVICE Fon morons.

I Specification of Letters Patent. Patented March`24, 1908.

Application led March 20, 1906. Serial No.3-06,967.

To/all whom it may concern:

` Be it known that I, MAXENCE JOSEPIISI-` DOINE ALEXIS IsNARD, a citizen of the RefA public ofy France, residing in Grenoble, in4

said -Republic, have invented certain new and useful Improvements in Starting De vices for Motors, of which the following is a specification.

The present invention hasior its 'Objectlv certam improvements in the apparatus for starting the motors -of motor vehicles and ringlng the and volume. p i

In order to simplify apparatus oftheabove kind', the improvements in accordance with the present'mvention consist mainly in v the direct action, without the intermediary of a liquid, 'of the compressed or liqueed gas (especially carbonio acid).upon apiston. The rectilinear-,movement thereby producedv is transformed into a circular movement by a rack propelled bythe piston and meshing with a spur pinionthe shaft of which meshes.

'with theshaft of the motor.

The improvements forming the object yof the invention also relate to an apparatus by means of which it is possible to return the rack of the apparatus to its -initialposition after the motor has been started, so that the a paratus maybe .ready for again starting t e motor.

In order that the invention may be readily and 'clearly understood the apparatus inf question is represented \by way-ofl example applied to a motor vehicle, where it replaces i .t

e startin handle.

Figure 1 1s a front elevation of thestarting device; Fig: 2 isa plan view.

, The usedl carboni'czgasis' not recuperated` the running of the-motor.. The low price b o? liquid carbonio acid and the small quan tit re airedv for roducing a starting im p se',l o not justifly in lmany cases any complication of the mechanism. I As` soon as the rackmoves forward, a

gas back to its initial pressure sleeve with clutch teethslides on the shaft of the small gear -wheelnand communicates its rotation Ito the shaft ofthe gas or' spirit motor. In its forward movement the'raok Which has received the action of the carbonio acld, has Overcome the resistance of the motor and has at the same time compresseda spiral spring which has become compressed ltowards the other extremity 'of the cylinder.

At the same time the clutch sleeve slides 0nl the shaft of the pinion, releasing the shaft Ot the explosion -motor, whichlthen rotates freely. The apparatus is lread for again starting the motor when this atter, after having been sto ped, is to be restarted.

' ,In order to o Itain the above' results, the

apparatus `comprises broadly a cylinder a bored throughout its entire length andarranged horizontally and-transversely at the 'front part of the vehicle in case the device is to be usedin connection with a motor vehicle. This cylinder or tube a is provided at lits intermediate ortion. with a double bearing which the s ait 'c of a pinion c passes, the pinion beingV arranged within .the cylinder, as shown.V Extending longitudinally within the cylinder is a rack b meshing with the pinion c'and provided at each'end witha piston b1. On the splined shaft c1 a toothed sleeve d is slidable, said sleeve being provided withl a serrated face and forming one mem-` ber oaclutch, the other member of which is similarly formedl and arranged upon the endV of the motor shaft m. By sliding the clutch `member d along the shaft-c1 said member maybe made to engage the other member of 'the clutch and thereby clutch in the motor shaft.

'Within the cylinder a is arranged a helical spring' c,` said spring being interposed be -tween one piston b1 and a plug screwed into one end ofy the-c lin'der. Sai spring tends to force the rack and its pistons toward and against a plug f which is screwed into the cylinder at the opposite end, and is provided with an 0 'enngor passage f which serves to conduct t e charge of carbonio acid required 4 for the Astarting impulsefY A slot is formed l,

longitudinally 1n the cylinder at the side containing the spring e.

guide for a rod i' connected with and extending laterally from said rack. By means of said rod i the angular displacement of the rack relatively to tliecylinderis prevented.

The rod i has anv extension '/jext'ending longitudinally of. the cylinder exteriorly4 thereof, this extension'being adjustably connected .to the .exhaust cockrk of `the cylinder. .In this :manner the exhaust of the carbonic acid gas at the precisemoment' vvhen the first explosion takes placein' the motor can be produced.

The discharge aperturemay be readily regulated,l for each motor, exactly' tothe 1 fraction ofthe necessary stroke of the rack.

The total stroke o f the rack is vlimited on Athe one hand by the total compression of the spiral spring and on the other hand by the position of the orifices o, formed in the cylindrical Wall of the c linder for the discharge of the 4carbonio aci gas, when vthese orifices are uncovered by the piston upon which the gas acts. Further, as soon as it is started, the rod i acts throughout its entire stroke upon a leaf spring y', so to engage the sleeve d With the crank shaft of the motor. When the rack returns to its. normal position., the

rod 'i leaves the spring j which then maintains thesleeve d out of engagement.

' To provide for backward travel lof the pmotor, which might be due to apremature ex- The provision of the pinion c with pointed teeth-and the addition of a heavy mass at a certain part of this inion assure an invariable position of repose or thisv pinion, so1 that engagement with the rack is always certain.l y

Invcertain cases in lwhich the motor moment necessitates that the pinion c should be of larger diameter, which Would entail an excessive length for the rack b and conse-l quently for the cylinder a, instead of using one pinion c the sleeve may be acted upon by an intermediate gear Wheel multiplying or dividing the action 'of the pinion in contact With the rack.

Having thus i described my invention, I claim as new and desire to secure by Letters Patent:

1. The combination, with the cylinder, of a v lshaft mounted transversely thereof, a pinion on ysaidshaft, 'a rack meshin ion and movable longitudinalI with said piny in said cy in- Said slot is of a length' iequal to the travel of the rack and serves asa e der, a clutch member slidabl'e on said shaft, 65 and an operative connection between saidrack and said clutch member.A

2. In a starting device, the combination of a cylinder, a piston-carrying element mov-'.1 able therein, a shaft to which said element 70 `transmits its movement, a clutch member 4slidable on said shaft, and, a connection be- In astartmg device for motors, the

'combination of a cylinder having a longitudinal slot, a rack in said cylinder, pistons carried by said rack at the endsthereof, a shaft carrying a pinion meshing with saidrack, a clutch member slidable on said shaft, and an operative connection between said rack and said clutch member, said connection embod y ing a device extending through the slot 1n 85 said c linder.

4.' n a starting device for motors, the combination of a cylinder, an element movable longitudinally therein, 'a clutch comprising a shiftable member driven by said el'e- 90 ment, means for moving said clutch into and out of operative position, and means ,carried by said element for operating said means and opening the cylinder to the escape of gas.

'5. In a starting device for motors, the 95 combination, With the cylinder and the e1e. ment movable longitudinally therein, of a shiftable clutch member driven by said element, means connecting said element With said clutch member and comprisin adevice carried by said element for slr' ting Said clutch member into and out of o erative position, and means carried by sai last-named neans for opening the cylinder to the escape f o gas.

6. In a starting device for motors,. the combination, with the cylinder and the element movable longitudlnally therein, of a clutch member' driven by said element, l means for shifting said vclutch member into and out of operative position, a rod carried by said element to operate said shifting means,

a cock to open the cylinder to the escapeof gas, and an'extension on said rod to operate said cock. j '4 v l 7. In a starting device for motors, the combination, with the .cylinder and the element movable longitudinally therein, of a, clutch member driven by said element,

means normally holding said clutch member I V mino erative position, and means carried by y said e ement to shift said first-named means. and thereby move said clutch member into operative position x l 8. In a starting combination, With the e Alinder and' the'ele-f ment movable longitud1nal1y-therein, of a clutch member drivenbyvgsaid element and device forv motors, "fthe 1.25

shiftable in axial direction, a s ring connectspecification in the presence of two subscrib- Aed with said clutch member W ich normally ing Witnesses. holds the same in inoperative position, and a rod element a'nd projecting MAXENCE JOSEPH SIDOINE ALEXIS ISNRD. 5 through the cylinder-wall into engagement Witnesses:

with said spring. PIERRE RUITTON,

In testimony whereof I have signed this MARIN VAQHON.V 

